Scraping-machine.



A. H! FARGO.

SGRAPING MAGHINB.

APPLICATION FILED JAN.17, 1913,

SLW/human L90,9l0 Patented Manz@ 1914L 4 SHEETS-SHEET l.

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SGRAPING MACHINE.

APPLICATION FILED JAN. I7, 191s.

Patented Mar. 24, 191% 4 SHEETS-SHEET 2.

A. H. FARGO. i

SGRAPHGV MACHINE.

APPLICATION 1111.31) JAN. 17, 191s.

1.090,10.. Patented Mar. 24,- 19144 4 SHEETS-SHEET 3.

wiftmoow A. H. FARGO.

SGRAPING MACHINE.

APPLICATION FILED JAN. 17, 1913. LQQ@ 1Q Patented Mar. 24, 1914.

4 SHEETS-SHEET 4.

Syvum/H601,

a ARTHUR. n. rancid Leoncio.

To all whom/t mag/concern Beit known that I, ARTHUR H. citizen of the United States, residing at West Newton, in the county ofV Middlesex and State of Massachusetts, have invented new and useful Improvements inScrapin'g- Machines, of which the following is a-speciication. g- 4 l .This invention relates to scraping machines, the object 1n view beingto provide a practical, easily operated.` machine for scraping the sides of houses, buildings, bridges, and other structures, for thepurpose of removing scale, paint and the like from the surfaces thereof, preparatory to ornamenting the Fanno, a

the repainting or otherwlse surfaces scraped and oleane The invention contemplates the. use of a suspension-"frame,- combined with Vmeans for raising and lowering the same, and a scraper mounted to travel back and forth on a substantially horizontalrail carried by the suspension frame, the scraper embodyingv a motor which is hung below the supporting rail and which is capable of adjustment, so as to bring the scraping member into proper relation to the .surface being operated upon,

said scraping member being driven by the motor.

With the above and other objectsv in view, the invention consists in the construction, combination and arrangement of parts, asv will be hereinafter more fully described, illustrated in the accompanying drawings, and pointed out in the claims hereunto appended.

In the drawings: Figure 1 is aside elevation of a portion of a building, showing the scraping machine of this invention in its applied position and relation thereto. Fig.

`2 is a front elevation on an enlarged scale,

showing the supporting truck, the rail therefor and the motor and scrapingv member, together with the means vfor mounting the, same. Fig. 3 is a vertical transverse section on the line 3 3 of Fig. 2. Fig. 4.1s a side Ielevation of the mechanism shown 1n Fig. 2, the supporting frail being in section. Fig. 5

1s a View similar to Fig. 4, showing the"r adjustment of the scraping member with relation to the motor casing. Fig. 6 is a diametrical section through-the scraping member shown in Figs. 1 and 2.: Fig.v 7 is al horizontal section on the line'7--7 of Fig. 6.-

Fig. 8 is a front elevation "of the scraper head, showing also aportionof the motor somme-momma.

' "Specification of-Letters Patent. Patmt-@dl-Mmr, @4L 191ML. Application filed January 17, 1913. Serial No. 742,748.

- jurious contact with the OF WEST NEWTON,-^MASSCHUSETTS.

casing. and the cylindrical scraping member mounted on the tumbling extension of the motor shaft. Fig. 9 is a cross section on the line 9-9 of Fig. 8. Fig. 10 is a detail horizontal section on the line 10-10 of Fig. 2. ig. 11 is a detail. vertical section on the line 11-11 of Fig. 2. Fig. 12 isa horizontal section on the line 12--12 of Fig. 2. Fig. 13 is a vertical cross section through the suspension frame and. platform, showing the raising and lowering means and the truck 'supporting rail in section. Fig. 14 is a side elevation of a scraping handhaving curved teeth. Fig. 15 is a detail elevation, similar to Fig. 8,- showing the endless scraper band and its wheels and otheractuating parts removed, and a cylindrical scraping member mounted lon the central tumbling shaft. f

As shown in Figs. 1`and 2, the machine contemplated in this invention comprises a suspension frame, embod ing two open center rectangular end members, each embodying substantially parallel upright-s 1 and 2, and top and bottom cross .bars 3 and 4, respectively, the end frames referred to forming spaced supports for a platform 5, upon which the operator is `enabled. to stand, as shown in Fig. 1, for operating the scraping mechanism, hereinafter particularly described.

The end members of the supporting frame are provided with eyes 6 to receive the lower blocks 7 of block and tackle hoisting and lowering means, said block and tackle being supported byn hooks 8 adapted to engage the upper part of a building, bridge, or other structure,\so as to support the apparatus as a whole therefrom and in close relation to the ,Y structure and' enable the suspension frame to be raised and lowered in accordance with the work.

Extending longitudinally of the suspension frame is a track rail 9 of inverted 'l'- shape in cross section, as sliown in Fig. 4, said rail being rigidlyfastened at its opposite extremities to the top cro'ss bars 3 of theend members of the suspension frame,

as shown in Figs. 1 and 13. 'At each extremlty of the rail 9 isa stop arm 10, with which `the truck,- hereinafter described, is-

adapted to come into contact, so as to prevent the truck wheels from coming into inhoisting 'and lowerin mechanism. Mounted upon the track rail 9 is a truck, embodying a truck frame 11, in the opposite ends of whichare journaled truck wheels 12 having their periph eries grooved, as shown in Fig. 4, so as to embrace the upstanding web of the rail 9 and prevent displacement of the truck from said rail.

-14 designates a motor casing which is mounted to turn on pivots 15 at the lower extremitiesvof a hanger frame, comprising.

, frame 11, so that the motor and its casing, to-

gether with the scraping member, and all operating and adjusting parts therefor, are supported by means of the king bolt 20, the arrangement described enabling the structure supported by the king bolt to swing and maintain itself in proper position by grav ity, in case the supporting rail 9 is not exactly horizontal.

1n view of the fact that the hanger frame, consisting of the arms 16, is journaled on the yoke, and the yoke in turn pivotally connected to thetruck on an axis at right angles to the axis on which the hanger arms 61 turn, it will be seen that the hanger frame and all parts carried thereby have a universal mounting with relation to the overhead truck and track rail, thus enabling the angle of the hanger frame and the motor and scraping member to be adjusted to suit conditions, such as irregularities in the surface being scraped or cleaned. Such variation in the angle of the parts referred to is well illustrated in Figs. 4 and 5. In Fig. 4, the scraper is shown as operating upon a vertical wall or surface 21, while in Fig. 5, it is shown as operating upon an angular offset 22 in such wall or surface.

Within the motor casing 14 is arranged an electric motor, the shaft of which eX- tends through the top of the casing 14, as best illustrated in Fig. 3, said shaft having connected thereto by a universal joint 24 a tumbling extension 25, onwhich is mounted the scraping member 26. The tumbling eX-' tension 25 of the motor shaft passes through 'tooth or projection 35 at the outer end of each guide 34, as illustrated in Fig. 5, the

rack bars 32 being normally held in engagement with the teeth 35 by means of springs 36. By means of the construction just described, it will be understood that by grasping the handle bars 30 and 33, and moving the latter so as to disengage the locking rack bars 32, the tumbling eXtension of the motor shaft may be set at any desired angle with relation to the motor shaft proper, for the purpose of varying'the angle of the scraping member in accordance with the angularity of the surface being scraped, as indicated in Figs. 4 and 5.

The motor casing 14 is connected to the scraper head 27 by means of hinges, comprising the upper and lower members 37 and 38, respectively, connected together by pivots or hinge pins 39. These hinge mem bers 37 and 38 are bolted or otherwise se! cured rigidly to the scraper head and motor casing, respectively, and the hinges are braced at opposite sides thereof by means of j plates 40, as illustrated in detail in Fig. 1.2, and shown in side elevation in Fig. 5, said bracing plates being rigidly connected to the scraper head 27 by screws 41, or the equivalent thereof.

If desiredfthe motor casing 14 may be locked in fixed relation to the hanger arms 16 by a locking bolt 42 vpassing through one of the hanger arms and entering a socket in the motor casing, as best illustrated 1n Figs. 2 and 4, said lockingbolt 42 being normally pressed inwardly i'nto locking engagement with thev motor casing by means of a coiled expansion spring 44, as shown in Fig. 2. By withdrawing the locking bolt 42, the motor casing is unlocked and may be swung to any desired angle with relation to thehanger fra-me, as illustrated in Figs. 4 and 5, for bringing the scraping member into the Vdesired relation to the surface being operated upon.

The scraping member, in the preferred embodiment thereof, comprises a sprocket wheel 45 fast on the tumbling extension shaft 25, and a sprocket chain 46 which passes aroundfthe wheel 45 and also around ot-her'sprocket wheels 47 fast on shafts 48 at opposite sides of the tumbling shaft 25, as shown in Fig. 7. On thesame shafts 48 with the sprocket wheels 47 are band wheels 49, around which passes a band 49 carrying on its outer face Scrapers or teeth 50 which are adapted to. revolve around the wheels 49 with the endless belt and work in contact with the surface being treated.

Instead of employing the endless band or single cylindrical scraping member 5l may be employed, as shown for example in Fig. 8, said scraper being mounted fast on the tumbling shaft 25, and being provided with spirally arranged scraping teeth 52. 'For' broad 'flat surfaces, the scraper member illustrated in Figs.,6 and 7, is preferred, as it will operate with greater rapidity, but where the device has tobe used in small corners and turns, the single cylindrical scraping member 51 may be used to a better advantage.

v Y In order to control the speed of the motor,

, 11 and hold to do this,

4thereto by means of a rheostat 53 is mounted on the handle bar 30, as shown in Figs. 1 and 2, the current wires shown at 54 and 55 leading to said rheostat and from thence to the motor 23.

y desired form or construction of rheostat may be employed for this` purpose, and by arranging the same on the handle bar 30, it is always accessible to the operator, who may thereby increase or diminish the speed of the scraping element.

At times, it is important to stop the truck the same stationary. In order brake shoes 56 are provided for the truck wheels 12, and slung adjacently supporting links 57 connected to the truck frame. Extending inwardly from the brake shoes 56 are connecting rods 58 which pass through eyes 59 on the lower ends of the guides 18, in which the opposite ends of .the yoke rod 17 are capable of moving up and down, as illustrated-in detail in Fig. 1l, To the inner endsy of these connecting rods 58 are pivotally attached brake levers 60 extending across each other and provided with slots 6l to receive a pin 62 carried by the upper end of a handle 63. By pulling downwardly on the handle 63 and correspondingly depressing the pin62, the levers 60 are correspondingly depressed, and the opposite ends thereof are forced apart, thereby sliding the connecting rods 58 and forcing the brake shoes 56 against the wheels 12. v Normally, the brake shoes are held inactive by means of a coiled contractile` spring 64, one" end of which is connected to the pin 62, while the opposite end is connected to 'a fixed point on the truck frame 11. wishes to hold they truck stationary, he grasps the handle 63 and draws the same downwardly, until the brake shoes are set against the wheels. In order to release the truc'k','it is only necessary to release the hany dle v63.

Where the larger scraping member, illustrated lin Figs. 6 and 7, is employed, and in order to accommodate such scraping :member, the hanger arms 16 are offset outwardly, as shown at 65 in Fig. 2. -The wires V53 and 54 may be carried through supporting eyes rheostat 53 is shown When the operator i `From the foregoing description, it' willi now be understood that the operator stands on the platform 5 of the suspension frame, and that said suspension frame is capable of 'being raised and lowered by means of the hoisting mechanism, illustrated andv referred to in the description. The suspension frame carries the supporting track rail 9, andthe truck is movable lengthwise of the said rail, so that the scraping mechanism may be shifted along a substantially horizontal path and in the desired proximity to the surface being operated upon. It will also be -seen that the hanger frame which supports the motor and scraping member, and the driving mechaiiisin, is hung from the overhead truck, and that it is capable of universal swinging movement, so that it may be rocked to one side or the other or toward and away from the wall or other surface. Furthermore, the motor and its casing may be tilted with respect to the hanger frame, and the tumbling shaft may be adjustedy by means of the scraper head to any desired angle for the proper presentation of the scraping member 7to the surface being operated upon. The

handle bar 30 iii-ay be used as a presser bar for holding the. scraping member with any desired pressure against the wall or other surface, and may also be used for drawing the scraping member out of contact with said surface, as may be required. Furthermore, the angular-relation ofthe tumbling shaft to the motor shaft may be fixed by means of the locking rack, comprising the rack bars 33, as hereinabove described. The as provided with a sui-tableoperating handle 67.

Instead of the straight teeth 50, shown 1n Fig. 2, on theendless scraping band 49", the teeth may be given a compound curve, as shown at 50 in Fig. 14.

Referring to Fig. 8, when the cylindrical scraping member 51 is employed, without removing the endless scraping band 49', a casing 68 will be band 49', so as to protect said band and the placed around the endless' actuating mechanism thereof. It is, liowever, preferred ,'when using the cylindrical scraping member 51, to remove the endless scraping band, and its actuating p arts, as shown in Fig. 15, and place the cylindrical scraping member 5l directly on the extension 25 ofthe central tumbling shaft. .The arrangement referred to is clearly illustrated in Fig. 15. f-

Springs 69 may be used, as shown in Fig. 2, `for holding the brake shoes 56 normally out of contact with the assisting the spring 64 w ch acts to draw w eels 12, thereby upwardly on the operating handle 63, -as vpreviously described.

What is claimed is: f f

l. A portable scraping machine comprising a suspensionv frame, overhead supporting raising and lowering means therefor, a Workmans platform on said frame, a horizontal track rail carried by the suspension frame above said platform, a wheeled truck movable-on said rail, a motor driven scraper suspended below and pivotally supported' by said truck, and brake mechanismfor holding the truck stationary.

2. Aportable scraping machine comprising a suspension frame, overhead supporting raising and lowering mea-ns therefor, a ivorkmans platform onsaid frame, a horizontal track rail carried by the suspension i a frame above said platform, a wheeled truck movable on said rail, a motor driven scraper suspended below and pivotallyl supported by said truck, and manually controlled means for setting the brake mechanism.

8. A portable scraping machine comprising a suspension frame, overhead supporting raising and lowering means therefor, a Workmans platform on said frame, a horizontal track rail carried by the suspension.

frame above saidplatform, a wheeled truck movable on said rail, a motor driven scraper suspended below and pivotally supported by said truck, a hanger fra-me by which the Scraper is supported, and a supporting yoke pivotally mounted on the truck and having the hanger frame pivotally connected thereto. p Y

4. Av portable scraping machine comprising a suspension frame, overhead supporting raising and lowering means therefor, a

workmans platform on said frame, a horizontal track rail ,:arried by the suspension frame above said platform,'a wheeled truck movable on said rail, a motor driven scraper suspended below and pivotally supported by said truck, a hanger frame for the scraper, a yoke pivotally mounted ,on the truck and having the hangerv frame pivot-. ally connectedthereto, anda king bolt connecting said yoke pivotally with the truck.

5. A portable scraping machine comprising a suspension frame, overhead supporting raising and lowering means therefor, a workmans platform on said frame, a horizontal track rail carried by the suspension frame above 4said platform, a wheeled truck movable on said rail, a motor driven scraper suspended below and pivotally supported by said truck, a motor, a motor supporting frame pivotally mounted on the truck, andmeans for tilting said scraper.

`6.l A portable scraping machine'cqmprising a suspensionframe, overhead. supporting raising and lowering means therefor, a workmans platform on said frame, a hori zontal track rail carriedby'the suspension frame above said platform, a wheeled truck movable o n said rail, a motor driven scraper suspended below and pivotally supported by said truck, a motor, a motor supporting frame pivotally mounted on the tru and means for tilting the scraper relativ ly to its actuating motor.

7. A portable scraping machine comprising a suspension frame, overhead supporting raising and lowering meansl therefor,I a workmans platform on said frame, a hrizontal track rail carried by the suspension ,frame above said platform, a wheeled truck movable on said rail, a motor driven scraper suspended below yand pivotally supported by'said truck, a hanger frame connecting the scraper pivotally with the truck, means for tilting the scraper relatively to the hanger frame, and means for maintaining the tilt of the scraper.A

8. A portable scraping machine comprising a suspension frame, overhead supporting raising and-lowering means therefor, a workmans platform on said frame, a horizontal track rail carried by the suspension vframe above said platform, a wheeled truck movable on saidrail, a motor driven scraper f suspended below and pivotally supported by said `truck, a hanger frame pivotally supported by the truck, a motor casing pivotally supported by the hanger frame, and

means for locking the motor casing to the hanger frame. f

y l0. A portable scraping machine comprising a suspension frame," overhead supporting raising and lowering means therefor, a

workmans platform on said frame, a hori zontal track rail carried by the suspension frame above said platform, a wheeled truck movable on said rail, a motor driven scraper suspended below and pivotally supportedA by said truck, a hanger frame pivotally supported by the truck, a motor casing p1votally supported by the hanger frame, and

mea-ns for adjusting the angle of the motor casing relatively to the hanger frame.

'114. A portable scraping machine comprising a suspension frame, overhead supporting raising and lowering means therefor, a

`workmans platform on said frame, a horizontal track rail carried by the suspension frame above said platform', a wheeled truck movable on said rail, a motor driven scraper suspended below and pivotally supported 1,090,910 ist .movable on said rail, a motor driven scraper suspended below and pivotally supported bysaid truck, a hanger frame pivotally supported by the truck, a motor slung in the hanger frame, a tumbling extension on the -motor shaft, a scrapingmember actuated by said extension, a scraper bearing in which said extension is journaled, and lmeans for adjusting said bearing to vary the angle of the tumbling extension and scraping member.

13. A portable scraping machine comprising a suspension frame, overhead supporting raising and k lowering means therefor, a workmans platform on said frame, a horizontal track rail carried by the suspension frame above said platform, a wheeled truck `movable on said rail,-a motor driven scraper suspended below and pivotally supported -by said truck, a handle for swinging said scraper on its pivotal mounting, and means for locking said handle. f 7

14. A portable scraping machine comprising a suspension frame, overhead supporting raising and lowering nfeans therefor, a workmans platform onv said frame, a horilzontal track rail carried by the suspension frame above said platform, a wheeled truck suspended below and pivotallysupported by said truck, and a tilting supporting yoke on the truck` on which the hanger frame is pivotally mounted.

1 5. A portable scraping machine compris-4 ing a frame,'a substantiallyhorizontal track rail carried by said frame, supporting raising and lowering means for said rail on said frame, a truck movable onsaid rail, a motor frame pivotally supported on said truck, a motor on the last named frame, and a scraper directlyconnected to and movable withsaid motor.

16. A portable scraping machine comprising a frame, a substantially horizontal track rail carried by said frame, supporting raising and loweringfmeans for said rail on said frame, a truck movable on said rail, a motor frame pivotally supported on said truck, a motor on the last named frame, a scraper directly connected to and movable with said motor, and brake mechanism for holding said truck stationary.

17. A portable scraping machine comprising a frame, a substantially horizontal track rail carried by said frame, supporting raising and lowering means for said rail on said frame, a truck movable on said rail, a motor frame pivotally supported on and suspended beneath said truck, a motor on the last named frame, and a scraper directly conneoted to and'movable with said motor.

In testimony whereof I alHX' my signature in presence of two witnesses.

ARTHUR H. FARGO.

Witnesses:

FRANCIS H. HOFFEGKER, THOMAS BOWEN, Jr. 

